Plastic optical fiber sensor for gastric ph detection

Francesco Baldini; Susanna Bracci; Franco Cosi

doi:10.1117/12.168759

15 February 1994 Plastic optical fiber sensor for gastric ph detection

Francesco Baldini, Susanna Bracci, Franco Cosi

Proceedings Volume 2085, Biochemical and Medical Sensors; (1994) https://doi.org/10.1117/12.168759
Event: Europto Biomedical Optics '93, 1993, Budapest, Hungary

Abstract

An optical fiber sensor for gastric pH detection is described, making use of plastic fibers as light carriers and a proper electronic system for both source driving and signal processing. The use of a suitable microprocessor and an internal buffer allows the realization of a portable and reliable device, fed by batteries. The indicators, bromophenol blue (BPB) or thymol blue (TB), are immobilized on controlled pore glass (CPG) fixed at the end of plastic optical fibers following a proprietary process. The realized optrode, satisfying clinical requirements, was tested `in vitro.' A precision of <EQ 0.04 pH units and a response time of (<EQ 15 seconds) were reached.

Citation Download Citation

Francesco Baldini, Susanna Bracci, and Franco Cosi "Plastic optical fiber sensor for gastric ph detection", Proc. SPIE 2085, Biochemical and Medical Sensors, (15 February 1994); https://doi.org/10.1117/12.168759

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